Windshield wiper housing exterior surface



FIG. 1 is a perspective view of the top and exterior side of a windshield wiper housing exterior surface showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an elevation view of the exterior side thereof; and,

FIG. 4 is an end elevation view thereof. 

The ornamental design for a windshield wiper housing exterior surface, as shown. 